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Backyard Flyer
GW Sport
Gallery
This model designed by Dave Robelen was featured in the spring 2002 issue of Backyard Flyer ©. The model is designed for stable gentle flights. These flight characteristics are derived from its high-wing cabin layout and light wing loading. Although my finished model weigh about 4 1/4 oz. more than the prototype, the resulting wing loading of 7.371 oz/sq ft still makes it a great sport flyer. Also the wing and tail were mounted at a slight positive incidence angle. The combination of all these features resulted in very forgiving flight characteristics and a lot of fun to fly.
As usual I could not resist the temptation add some additional features of my own. I added a hatch in the bottom of the fuselage to avoid taking off the wing every time the battery was changed. In addition the tail wheel has functional steering. Other cosmetic additions include a painted cockpit sides and floor. The side windows are framed by 1/16" balsa to firmly secure them to the fuselage. I covered the model using red and jet white Econokote ©. All the seams between colors were joined using Top Flite Monokote Trim Solvent ©. For all the 1/8 inch stripping I used insignia blue Monokote Trim Sheet ©.
Thanks to Gary Jone's (sr71fan) posting at the Radio Control Zone bulletin board, LED navigation lights were installed for "night" flying. Super bright green and red LED's are in the wing. The vertical fin has a flashing red LED. They were powered from the unused rudder channel in the receiver. I used 30 gauge solid conductor wrapping wire for all navigation light cabling. This wire is very light and comes insulated. I found it at my local Radio Shack © store. Since all these features add weight I cut out a second window and the aft portion of the fuselage to save a few grams.
The 720 mAh 8 cell battery holds its voltage for a very long time. The first motor was burned out because of overheating. I changed the motor and installed a heat sink. The heat sink is very effective in drawing heat away from the motor.
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Specifications
| Wing Span |
| 35 in |
| Length |
| 27 in |
| Weight |
| 10 3/4 oz |
| Wing Area |
| 210 sq in |
| Wing Loading |
| 7.371 oz/sq ft |
| Motor |
| GWS DXA Electric Motor |
| ESC |
| Great Planes C-5 Nano |
| Battery |
| 8 cell 720 mAh NiMh Pack |
| Transmitter |
| Hitec Laser 4 |
| Receiver |
| Hitec Feather |
| Servos |
| Hitec HS-55 |
| Status |
| Active |
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Click here for construction details!!!
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